Normal serum prostate specific antigen levels in men in Yasuj province, Islamic Republic of Iran.

We assessed serum prostate specific antigen (PSA) levels in 650 men over 40 years referred to 3 Yasuj hospitals for blood cell count in 2003/2004. Men affected by prostate cancer, prostatitis or transurethral instrumentation were excluded. PSA was determined by an immunoassay technique. PSA levels in different age groups were: 40-49-year-olds--mean = 0.7 ng/dL, normal = 0-1.35 ng/dL; 50-59-year-olds--mean = 0.9 ng/dL, normal = 0-1.85 ng/dL; 60-69-year-olds--mean = 1.6 ng/dL, normal = 0-3.2 ng/dL; > or = 70-years-olds--mean = 2.3 ng/dL, normal = 0-4.4 ng/dL. Normal PSA levels in our society were lower than those in the United States, Europe and Japan.